Answer: Option [A]Green Revolution in India has so far been most successful in case of wheat. The Green Revolution in India refers to a period when agriculture in India improved due to the adoption of novel methods and technology in agriculture. The Green Revolution allowed developing countries, like India, to overcome poor agricultural productivity. Within India, this started in the early 1960s and led to an increase in food grain production, especially in Punjab, Haryana and Uttar Pradesh during the early phase. The main development was higher-yielding varieties of wheat, for developing rust resistant strains of wheat.